\begin{table}[h]
 \centering
 \subtable[$key_5=5f46$]{
     \begin{tabular}{cc}
         0.0780 & \_f\_\_ \\
         0.0420 & \_3\_\_ \\
         0.0420 & \_1\_\_ \\
         0.0390 & \_d\_\_ \\
         0.0280 & \_b\_\_ \\
         0.0230 & \_5\_\_ \\
         0.0200 & \_9\_\_ \\
         0.0130 & \_c\_\_ \\
         0.0130 & \_7\_\_ \\
         0.0120 & \_4\_\_ \\
     \end{tabular}
 }
 \subtable[$key_5=4fdc$]{
     \begin{tabular}{cc}
         0.0630 & \_f\_\_ \\
         0.0320 & \_3\_\_ \\
         0.0270 & \_d\_\_ \\
         0.0250 & \_1\_\_ \\
         0.0140 & \_b\_\_ \\
         0.0140 & \_4\_\_ \\
         0.0130 & \_c\_\_ \\
         0.0120 & \_9\_\_ \\
         0.0100 & \_5\_\_ \\
         0.0090 & \_7\_\_ \\
     \end{tabular}
 }
\end{table}
